Plant Theory Organic Multi-Purpose Fertiliser Concentrate
Give your plants the organic treatment
Plant Theory multi-purpose fertiliser is a careful blend of seaweed and plant extracts, perfectly balanced to provide essential minerals and nutrients to vegetables, flowers, fruits, salad crops and even house plants. We've created it as a concentrate to minimise the packaging required, so one little sachet is all you need to make up a whole litre of plant-improving solution.
Seaweed contains natural plant nutrients such as Nitrogen and Potassium to improve plant immunity, enrich soil and provide strong and healthy growth
Primrose is the place to be to Discover Everything Garden.
We were created in 2003 to become the UK's largest online-only garden centre. Thousands of plants, planters, awnings, garden furniture sets, water features and more line our digital shelves, and we're ready to fill your garden with comfort, quality, colour and style.
If you'd like to find out more, check out our 'About Us' page.
We want you to be happy with your purchase from the moment it arrives, but if you aren't you have the right to return it within 14 days. Just head to our Returns Page, send us an email, receive a returns number and fire your product back to us.
We'll refund the full cost as well as standard delivery.
Highlands and Islands
We calculate delivery costs at checkout based on your entered postcode, so you'll know at that stage if your chosen product can be sent to you. If you have any queries, please head to Contact Us and send over a form, or visit our Help Centre.
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